JP2003064842A - Solar battery device for construction material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an easily manufacturable solar battery device for a construction material capable of freely arranging a solar battery cell having the same shape and completely making an area having no solar battery cell indistinguishable on the wall face of a building for improving an installation appearance. SOLUTION: In a solar battery module S for a construction material, a plurality of solar battery cells 3 are arranged between a transparent front face cover 1 and an opaque back face cover 2, while a light receiving face of the back face cover 2 can be observed via the front face cover 1, and the light receiving face of the back face cover 2 has an appearance pattern and a color substantially equal to those of the wall face of the building to which a device main body is installed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is applicable to a solar power generation system for a house, in which a solar cell can be attached to a wall surface of a building such as a house (including a wall surface such as a veranda), and a plurality of solar cells can be installed. The present invention relates to a solar cell device for building materials, which includes the solar cell.

[0002]

2. Description of the Related Art A solar cell module installed in a building will be described. As shown in FIG. 8, the solar battery module J includes a solar battery cell 3 sealed with an encapsulant 4 made of acrylic or silicone resin having excellent weather resistance, EVA (ethylene vinyl acetate), or the like. It is configured to be sandwiched between a front cover 1 that is a light-transmitting glass substrate or a resin substrate that serves as a light-receiving surface, and a back cover 2 that uses a film having excellent weather resistance. The frame 5 provided on the four edges of the solar cell module J has a shape and material suitable for a method of fixing a building material such as metal such as aluminum, resin, or rubber. No structure is known.

Since the solar cell module J can be used as it is as a wall material of a house, like a solar cell module having a general frame, a fixing rail is attached to the wall material and the frame of the solar cell module is bolted. No need for work and materials. As a result, the number of members and the number of construction steps can be reduced, and since there is no connecting rail between the solar cell module and the wall material, the thickness can be reduced and the installation appearance can be improved.

Further, since the solar cell module J is constructed by electrically connecting the individual solar cells 3 having a predetermined shape, a gap K is formed between the solar cells 3, and the gap K is formed. Thus, the pattern and color of the back cover 2 existing on the back surface of the solar battery cell 3 can be visually recognized. Therefore, in order to make the color tone the same as that of the solar battery cell 3, the back cover 2 may be made to have substantially the same surface color as the solar battery cell 3 so that the entire surface has an appearance as if it were one solar battery.

[0005]

However, in the above-mentioned solar cell module J, the size of the entire solar cell module J is determined from the basic dimensions of the building material because of the structure in which the solar cell is assembled to the building material such as the wall material. In addition, the solar cell 3 that constitutes the solar cell module has a fixed cell size because of its manufacturing method, and when these are arranged in a building material, it is difficult to cover the entire surface with solar cells evenly. Is.

As a solution to this problem, the back cover 2 has the same color tone as the solar cells 3, and as shown in FIG. 9 (a), the surface of the wall member 8 without the solar cells 3 is covered. On the other hand, as shown in FIG. 9B, by arranging the frame-less solar cell module J1 including the irregular-shaped solar cells 3A having a plurality of shapes on the entire surface of the wall member 8,
By hiding the pattern on the surface of the wall member 8 or by arranging the solar battery modules J2 having the same shape of the solar battery cells 3B as shown in FIG. A solar cell module J3 in which a pattern on a part of the surface of the wall member 8 is hidden, or as shown in FIG. 9D, the solar cells 3C having the same shape are provided and the space between the solar cells is appropriately enlarged.
9 (b) by disposing all over the surface of the wall member 8.
A method of hiding the pattern on the surface of the wall material 8 can be considered in the same manner as.

However, all of these methods can only make the color tone similar to that of the wall surface, and even if the discomfort is improved at a distance, it can be observed up close like a building wall surface of a house including a balcony wall surface. The space is insufficient, and as can be seen by comparing with FIG. 9A, even if the color of the back cover 2 is adjusted to a color tone close to that of the wall material 8, the pattern cannot be reproduced, and the wall material 8 It is difficult to harmonize with the design of the house, and it may spoil the appearance of the house. Moreover, when viewed obliquely, the wall material and the solar cell module are clearly separated and visually recognized due to the light reflection on the uneven surface and the light receiving surface of the solar cell module, which also impairs the external image of the house.

Further, in the solar battery module J1 shown in FIG. 9 (b), the solar battery cells can be arranged on almost the entire surface, but the area where the back cover can be seen can be reduced, but the solar battery cells have a different shape. Processing is a problem because it complicates the manufacturing process, and in addition, it is necessary to wire other standard-sized solar cells so that the generated current or generated voltage is obtained, which also complicates the structure.

In the solar cell module J2 shown in FIG. 9C, the pattern on the surface of a part of the wall member 8 is hidden, and the pattern and the color tone are different from those of the surrounding part, which also impairs the appearance.

Further, in the solar cell module J3 shown in FIG. 9 (d), since the visible area of the back cover seen through the gaps between the solar cells is large, the weight of the wall is large when the color tone is matched with the surrounding wall material. The feeling cannot be reproduced and the appearance is impaired.

Therefore, the present invention has been devised in view of the above-mentioned problems, and it is easy to manufacture, and the solar cells of the same shape can be arranged freely, and the area where the solar cells do not exist is provided. It is an object of the present invention to provide a solar cell device for building materials, which can be completely melted into the wall surface of a building and has an excellent installation appearance.

[0012]

In order to solve the above problems, a solar cell module for building materials according to the present invention is a solar cell device for building materials arranged on the wall surface of a building in the same plane as the wall material. A plurality of solar cells are arranged between the translucent front cover and the non-translucent back cover, and the light receiving surface of the back cover is observed through the front cover. In addition, the light receiving surface of the back cover has the same appearance pattern and color as the wall surface of the building in which the apparatus main body is disposed.

Further, the light receiving surface of the front cover has an appearance pattern substantially the same as the wall surface of a building in which the apparatus main body is installed.

As a result, the degree of freedom in arranging the solar cells can be increased, and the difference in design between the main body of the device and the wall surface on which it is arranged can be minimized, and a fire-proof grade building material required at that location. Can be selected easily.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a solar cell device for building materials according to the present invention will be described below in detail with reference to the drawings schematically shown. The same members are designated by the same reference numerals, and the duplicated description will be omitted.

An industrialized house will be described as an example, which is applied to a wall surface of a house as a building material and is arranged on the same surface as the wall material so as to be mixed with the wall material of the house to form the wall surface.

FIG. 1 shows a solar cell device S for building materials according to the present invention.
The overall schematic configuration of is shown in a perspective view. Further, FIG. 2 is a perspective view showing a state in which the solar cell device S for building material of the present invention is mixed with the wall material and attached when the wall surface of the house is assembled. In addition, FIGS. 3A to 3E are cross-sectional views showing a configuration example of the solar cell device S for building materials.

As shown in FIG. 1, a solar cell device S for building materials
Between the translucent front cover 1 and the non-translucent rear cover 2 having the same area, for example, in the encapsulating material 4 which is translucent and has a smaller area than the front cover 1 and the rear cover 2, for example. A plurality of solar cells 3 are arranged in the
Are electrically connected to each other, and the light receiving surface of the back cover 2 can be seen through the front cover 1. The light receiving surface of the back cover 2 can be connected to the wall surface of the building in which the apparatus main body is disposed. It has almost the same appearance pattern and color.

Here, the light receiving surface of the surface cover 1 may have an appearance pattern substantially the same as the wall surface of the building in which the apparatus main body is installed.

More specifically, the solar cell device S for building materials
Is a front cover 1 made of a translucent glass substrate, a resin substrate, a film, etc., and a back cover 2 made of a metal substrate such as aluminum, a ceramic substrate such as tiles, a resin substrate, or a resin film such as a fluororesin. A plurality of solar cells 3 are arranged in series and / or in parallel and electrically connected between them, and one or both sides of the solar cells 3 are filled with EVA (ethylene vinyl acetate) or silicone resin. It is configured by being sandwiched between materials 4. Wiring for electrically connecting the solar cells 3 to each other can be realized by using a metal foil such as a copper foil and coloring the surface thereof by a paint process to realize the same pattern and color as the wall surface. The wiring is not shown for simplicity.

The back cover 2 is made of the same material as the wall material, such as a tile or a ceramic substrate, and its surface is the same as other wall materials, or has substantially the same appearance except the portion where the solar battery cells 3 are arranged. To be

FIG. 2 is a view showing a state in which the building material solar cell device S in which the back cover 2 has substantially the same pattern as the surrounding wall surface is actually installed on the wall surface of the house. In the figure, reference numeral 8 is a normal wall material, which is fixed to the wall surface by connecting it to the pillar 10 of the house or the adjacent wall material with fixing metal fittings as in the solar cell device S.

Examples of the solar cell device S of FIG. 1 taken along the line AA are shown in FIGS. 3 (a) to 3 (e). FIG. 3A shows a structure in which the back cover 2 has a very thin sheet shape. Further, in FIG. 3B, the surface cover 1 has an extremely thin sheet-like structure. In addition, FIG.
Is a structure in which a substrate such as glass is used for the front cover 1 and a substrate made of the same material as the wall material 8 is used for the back cover 2, and the frame 5 is arranged on the outer circumference thereof. Also, FIG.
(D) has a structure in which a substrate made of the same material as the wall material 8 is arranged on the back cover 2 and the front cover 1 and the solar battery cells 3 are fitted in the regions formed in the recesses of the back cover 2. Is. Further, in FIG. 3E, the rear cover 2 is divided into a rear cover 2A, which is a substrate made of the same material as the wall material 8, and a sheet-shaped rear cover 2B, and a combination of the front cover 1 and the rear cover 2B is shown. The back cover 2A has a structure to be fitted in a region formed in the recess.

As shown in FIG. 2, when the surface design of the wall material 8 of the house is a design in which bricks are piled up, it is shown in FIGS. 3 (a), 3 (b) and 3 (c). like,
If the resin film or the glass substrate that is the front cover 1 covers the entire surface of the back cover 2, the back cover 2 has the entire surface, or a region where the solar battery cells 3 are not arranged,
That is, the gap and the like have the same design as the wall material 8.

Further, as shown in FIG. 3D, when the front surface cover 1 is smaller than the rear surface cover 2 and the solar battery cells 3 are embedded in the concave portion of the rear surface cover 2, the concave portion of the rear surface cover 2 is also covered. The brick design. At this time, during the manufacturing process, as shown in FIGS. 4A and 4B, the protrusions 7 for holding the solar battery cells 3 are provided regardless of the presence or absence of the brick design, and the The structure may be easy to arrange. In the figure, 2a is a groove having a brick shape, 6 is a space for containing an encapsulating material which is a fluid resin before solidification, and 11 is a thin plate-like laminating material as the encapsulating material.

Although not shown in the drawing, as shown in FIG. 3C, a frame 5 made of metal such as aluminum, iron, or stainless steel, or resin is provided at the end of the solar cell device S. It may be used as an end protection, a holding part, a mounting fitting, or a structure in which the frame 5 is not provided by being integrated with another wall material.

Thus, since the brick design is visually recognized through the surface cover 1, it is possible to make it look as if the solar cells 3 are attached to the brick surface.

Unlike the conventional case, the back cover 2 is made to have the same color as that of the wall surface, so that the texture and the like are not reproduced. Therefore, not only the solar cell 3 but also the wall surface feels uncomfortable. By making the solar cells 3 appear on top of each other, a strong impression of a new design in which a large number of solar cells 3 are scattered on the design of the wall surface and eliminating the discomfort caused by the presence of the solar cells Is possible. Further, this effect is remarkable in other crystalline solar cells which have a design property even when the solar cell is a single unit.

Further, by using the same building material as the wall material for the back cover 2, it is possible to obtain fireproofing performance as a building material, but it is necessary to install it in a place where the fireproofing performance of the wall material is not required. For example, a resin substrate having only an external pattern and a color similar to each other may be used, which can reduce the weight and reduce the material cost.

Further, as shown in FIG. 3A, when the back cover 2 is not a building material like a resin film, a resin film on which a design in which bricks are stacked is printed is used. Further, as shown in FIG. 3D, when the concave solar cells 3 of the back cover 2 which is a wall material are to be embedded, as shown in FIG. 3E, the one shown in FIG. The material may be assembled with the adhesive 9 or the like. According to this configuration, even if the back cover 2B has low fire protection performance, the wall material of the back cover 2A supplements it, so that the fire protection performance as a wall material can be made sufficient.

The surface cover 1 does not reduce the power generation efficiency of the solar battery cells 3 regardless of the above-mentioned structure.
Materials with favorable light transmission such as colorless and transparent (especially glass)
Is preferred. Further, as a result, the design of the front surface of the back cover 2 becomes easier to see, so that the appearance can be made more similar to that of the surrounding wall material.

Further, since the back cover 2 may be seen from the gap in which the solar cells 3 are arranged, there is no particular limitation on the concentration and diffusion of the arrangement of the solar cells 3, and the system capacity and the space between the solar cells 3 are not limited. It is possible to arrange the tab wiring according to the purpose such as the workability of the tab wiring and the arrangement of the solar cells 3 themselves, and it is possible to improve the appearance of the wall surface other than making the solar cells inconspicuous. is there.

By the way, for a solar cell module installed on a wall surface or a balcony or a solar cell module for building materials,
Even if the back cover 3 is simply colored to the same color as the wall surface or the color tone of the solar battery cells 3 is similar to that of the outer wall, as shown in FIG. 5, such a solar battery module J4 is observed from an oblique direction. Then, the surface of the front cover 1 shines due to the reflection of sunlight and the reflection of surrounding buildings, and the pattern on the surface of the back cover 2 becomes invisible, so that it appears as a flat surface without irregularities, and the surrounding wall material. 8 The appearance is apparently different from the part with the pattern due to the unevenness of the surface. Furthermore, even if the color tone of the back cover 2 or the solar cell 3 is changed, it is invisible because of the reflection itself, so that there is no effect, and as a result, the appearance is impaired.

In the present invention, the surface of the back cover 3 on the light receiving side has a pattern / color that has substantially the same appearance as the surface of the wall material 8 of the building in which the apparatus main body is disposed. Although it looks as if the wall is sinking inward, it is visible as a continuous wall. However, as for this effect, when the irradiation angle of sunlight or the viewing angle becomes shallower than a certain value, light from the periphery may be reflected on the surface of the surface cover 1 and the sense of unity with the wall surface may be lost.

Therefore, in order to eliminate the discomfort in the appearance even in such a case, as shown in FIG. 6, the surface of the surface cover 1 is formed with a pattern having an appearance substantially the same as the wall surface of the building where the main body is arranged. Incidentally, as shown in FIG. 7, the wall surface can be made to appear continuous even when viewed from an oblique direction.

Specifically, as shown in FIG. 6, unevenness is formed on the surface of the surface cover 1 of the solar cell device S for building materials so that the surface has an appearance substantially the same as the wall surface of the building in which the main body is installed. Set up. At this time, the arrangement position of the solar battery cells 3 and this concave and convex position, and further, the pattern of the wall surface of the back cover 2 is made to match as much as possible to suppress the variation of the wall pattern when visually recognized from the front, and to be viewed from an oblique direction. But you can make the walls look continuous.

In the present embodiment, the solar cell device for building materials used as the wall material of the building material for houses has been described as an example of an industrialized house in which a wall surface is formed by mixing with a general wall material, but the present invention is not limited to this. It is not a thing, for example, building materials to be installed on the balcony, building materials to be installed on the railings of fences and bridges, solar cell devices of monuments with a photovoltaic system with an appearance design that looks like wood, and suppress the difference in appearance from its surroundings. The solar cell device for building materials that is attached for the purpose can be applied, and can be appropriately modified and implemented without departing from the gist of the present invention.

[0038]

As described above in detail, according to the solar cell device for building materials of the present invention, a plurality of solar battery cells are provided between the transparent front cover and the non-transparent back cover. The light-receiving surface of the back cover can be seen through the front cover while the light-receiving surface of the back cover has the same appearance pattern and color as the wall surface of the building in which the device body is installed. Therefore, the difference from the wall surface of the building can be reduced as much as possible and the appearance is not spoiled.

Further, the solar cells can be freely arranged on the back cover, which facilitates the manufacture of the solar cells and the design of the entire apparatus.

Further, by making the light-receiving surface of the surface cover have an appearance pattern substantially the same as the wall surface of the building in which it is installed, the difference in appearance between the wall surface of the building and the device can be reduced when viewed from an angle. .

[Brief description of drawings]

FIG. 1 is a perspective view schematically illustrating an embodiment of a solar cell device for building materials according to the present invention.

FIG. 2 is a perspective view schematically illustrating an external configuration in which the building material solar cell device according to the present invention is mixed with a general wall material and attached to a house.

3A to 3E are cross-sectional views schematically showing a structural example of a solar cell device for building materials according to the present invention.

4 (a) and 4 (b) are cross-sectional views each schematically illustrating how to install a solar cell of the solar cell device for building material according to the present invention.

FIG. 5 is a perspective view schematically showing the difference between the solar cell module of the present invention and the outer wall when observed from an oblique direction.

FIG. 6 is a diagram schematically illustrating another embodiment of the solar cell device for building materials according to the present invention, which is a portion showing a state in which a light-receiving surface of the surface cover has an appearance pattern substantially the same as the surrounding wall surface. It is an exploded perspective view.

FIG. 7 is a perspective view schematically showing a difference from the outer wall around the solar cell device for building material according to the present invention when observed from an oblique direction.

FIG. 8 is a cross-sectional view illustrating a configuration of a conventional solar cell module.

9 (a) to 9 (d) are perspective views for explaining the configurations of a conventional wall member and a solar cell module disposed thereon, respectively, and FIG. 9 (a) shows a solar cell module disposed therein. The figure which shows a non-wall material, (b) is a figure which shows the solar cell module which spread | arranged and arrange | positioned the irregular-shaped solar cell from which shape differs mutually, (c) shows the solar cell which arrange | positions a required number of solar cells. FIG. 5 is a diagram showing a state where the module is arranged on the wall material, and FIG. 7D is a diagram showing a state where the solar cell module in which the solar battery cells are diffused is arranged on the wall material.

[Explanation of symbols]

1: Front cover 2: Back cover 3: Solar cell 4: Encapsulation material 5: Frame 6: Space 7: Protrusion 8: Wall material 9: Adhesive S: Solar cell device for building materials

Claims (2)

[Claims] 1. A solar cell device for building materials, which is arranged on the wall surface of a building on the same surface as a wall material, wherein a transparent front cover and a non-transparent back cover are provided. In addition, a plurality of solar cells are provided, and the light-receiving surface of the back cover is observable through the front cover, and the light-receiving surface of the back cover is a wall surface of a building in which the device body is installed. A solar cell device for building material, which has substantially the same appearance pattern and color as the above. 2. The solar cell device for building materials according to claim 1, wherein the light-receiving surface of the surface cover has substantially the same appearance pattern as a wall surface of a building in which the device body is disposed. .